Home / 20,876.16-31,311.21-6,081.11

Finding the Fourth Proportional to 20,876.16, 31,311.21 and 6,081.11

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Solution

The fourth proportional to 20,876.16, 31,311.21 and 6,081.11 is: 9,120.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.16 : 31,311.21 = 6,081.11 : x
  2. Step 2: Convert to fraction form
    20,876.16/31,311.21 = 6,081.11/x
  3. Step 3: Cross multiply
    20,876.16x = 31,311.21 × 6,081.11
  4. Step 4: Simplify right side
    20,876.16x = 190,406,861.70
  5. Step 5: Solve for x
    x = 190,406,861.70/20,876.16
  6. Step 6: Final answer
    x = 9,120.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.